Gas-engine.



A. RANDOLPH. GAS ENGINE.

APPLICATION FILED AUG. v24, .1910.

190416,49L Patented Dec. 1o, 1912.

fwl, l WM MW UNTED STATES PATENT. OFFXCE.

ALFRED RANDOLPH, 0F SALEM, OHIO.

f GAS-ENGINE.

To all whom fit may concern:

Be it known that l', ALFRED RANDQLPH, a citizen of the Unitedv States,residing at Salem, Columbiana-county, Ohio, have invented certain new'and useful Improvements in Gas-Engines, of which the following isl aspecification.

This invention, pertaining to gas engines of two-cycle type, will bereadilyunderstood from the following description taken in connectionwith the accompanying draW- ing, in which:- l t Figure 1 is averticallylongitudinal section of a gas engine exemplifying my invention;

and Fig. 2 is a side elevation of the timing device; diagrammatiolinesconnecting Figs. .1 and2 to illustrate suitable circuitconnectionsb'etween the timing device and the electromagnet foroperating the fuel-valve. In the drawing :-1, indicates the -cylinder:2, the closed crank-case connected therewith: 3, the crank-shaft: 4, thepiston: 5, the connecting rod: 6, the inlet-port for admitting fuel intothe upper end of the cylinder: 7, the exhaust-passage: 8, the eX-haust-port leading'trom the cylinder to the' exhaust-passage and openedand closed .by the piston in its reciprocations: 10, an igniter, ofusual type, to ignite the charge in' the cylinder: '11, a port placingthe crank-- case in communication vwith thecylinder, this port beingopened and closed by the piston in its reciprocations: 12,- an inwardly,

opening check-valve to admit air to the crank-case: 13, a supplementarycylinder open to the crank-case: 14, a piston v in the supplementarycylinder:

15, a rocker pivoted within the 'crankcase and connected A. with thesupplementary piston: 16,'V a link connecting the piston with the rockerto. cause thefsupplementary piston' to move :iii unison with the mainpiston: 17 ,the fuel-inlet: 18, a diaphragm pump, the diaphragm beingspring loaded: 19, a valve disposed between fuel-inlet 17 'and thepump-chamber, .this valve being the inlet-valve of the pump: 20,

'a fuel-passage leading from the lpump to inlet-port 6: 21, thedischarge-valve of the pump, disposed between the pump-chamber andpassage 20: 22, the fuel-valve arranged to open and close fuel-port 6,this valve opening toward the cylinder: 23, a spring oii the stem of thefuel-valve, serving to 'close it: 24, 'an electromagnet 25, the arma-Speciicjatoii of Letters Patent. Application led August 24, 1910. SerialNo. 578,740.

p Patented Dec. 10, 1912.

a port placing this air-passage in communi# cation Witli the crank-case:31, a checkvalve disposed between port A30 and passage 29 and openingaway from the crankcase: 32 -one of' the fixed bearings of thecrank-shaft: l33, an angularly adjustable collar clamped upon thisbearing: 34, a' block of ,insulating material secured to the collar: 35,a metallic spring secured to the block between it and the bearing: 36, acontact-point carried by the spring: 37, a con- ,tact-point projectingfrom the crank-shaft,'

or a collar fixed to it, adapted, at each turn fof the crankshaft, tomake momentary contact with point 36: 38, a conductor leading from theelectromagnet to collar 33, and,

as a means for adjusting contact-spring 35 so as to bring itscontact-point more or less in the range of contact-point 37: and 40, agenerator of' current arranged in a conductor between the electromagnetand oontact-spring. 35', -which generator may be a battery or dynamo.

On the upstroke of the main piston a partial vacuum is created in thecrank-case, which vacuum is satisfied by the inflow of air throughvalve12. On the downstroke of the piston this air, confined in the crank-'case, is compressed. The supplementary therefore, tocontact-point 37:39, a screw ymounted in the insulating block and serving n f piston 14serves in increasing the displace-- i ment on the downstroke of the mainpiston.

When the pressure of the aii in tliecrankcase 'exceeds the resistance ofthe spring on',4 valve 31, then that valve opens and permits thecompressed air to iiow through passage 29 and .go to the `back of ,tliefuel-valve; When the descending main piston opens port' ido 11compressed air from the crank-'case blows through the cylinder and out'at exhaust, port` 8,' cleansing the cylinder of the unbl'irned gases. enthe rising pistonloses instant the electric circuit is closed by4contact-point 37, thus energizingthe elecy i6 into thev cylinder, thisblastv of air spray# exhaust-port Sluit leaves the cylindercharged with-clear'airtunder some pressure, and at tromagnet, whereupon -thefuel-fvalve is quickly openedA and the compressed air from`- passage 29permitted'toblow through port ing'into the cylinder the fuelfed through'passage Q0, the consequence being that thev cylinder becomes chargedwith a mi'rrture of air' and fuel,"wh1ch, at the properjtime, is

. ignited by the igniter in the usualavay, the expansion due to theburning of the fuel'in the cylinder producing the'power stroke ef thepiston.

In starting theiengine the' diaphragmpum may be Worked by hand throughlever '28, t e upstroke of the diaphragm being pro- 2'0' Ithe'spri'ngload over the diaphragm, thus'. delivering fuel behind the fuelLvalve.'-After .V

duced by theflever and the downst'roke by the engine is started then thediaphragmpulsating pressure. piston 26 Works may be' filled withlubricatpump 'Will be operated by pisto'n 26 under the influence of thepulsations of pressure."

derived fronrthe exhaust, or othersource .of The chamberlin Which ingAoil', preferably of 'the same kind as is used in the crank-case, huspreventing they piston 26 from being subjected to'direct contact withthe exhaust gases;- The pivot4 of lever'28, as shownyisan eccentrico1ieand silpp'ly of fuel to be carried into the cylinder by the air ateach opening of the fuel valve.

Conductor 3S -is illustrated a"l being connected with cellar-33, but itis suiiicientif it beconnected With any metallic'part of the' engineinconstant electrical connection'with contact-point 37. vThe angularadjustment ofcollar 83 permits of adjusting the time at which thecircuit'is closed, and also the direction of crank-motion, and screw 39provides for the adjustment of the duration of' 'time during 'which thecircuitshall be closed. AS seen in the drawing, the main piston issurmounted by the detlector usuallyprovided to prevent direct flow ofvmiXt-urel across the piston in usual constructions where the mixture 1scompressed inthe crank-case, the object ofthe detlectoribeing to preventthe mixture from going directly across the piston-and Wasting out of theeX- haust,'and to compel it to move upwardly-s0 as to displace theproducts of combustion and clean the'cylinder. ln my system the ldeiector serves to prevent the air from port llfrom passing directly tothe' exhaust-port y and impelsrit upwardly s0 as to cause the burntgases to become exhausted" ahead ofA ing Waste of mixture.

Passage 29 is not for vapor but is for the conveyance of ail-to blowinto the upper end of the cylinder the liquid fu'el delivered inmeasured quantities behind ,inlet-valve 6 -by the action of the to thevalve and the valve is in turn close to the'cylinde1? The quantity of'liquid 4fuel ent-en .the quantity -or pressure of the air that'thatquantityof air will always vbe sufficient -to sp'ray thefuel int'o thecylinder,n0r is the quantityf-of fuel thus sprayed into the cylinderdependent onthe pressure acting on piston 26;, whichoperates the pump;understanding :'that' t-he pump operates'full stroke 'the'.pump issmall,'but little of the liquid ucl being requiredfor each lmpulse, andthe uantity'sprayed into the cylinder at each the eccentric pivot ofthepump 'lever is not quantity of fuelfper impulse. Desired richness oflmixture and high Aefiiciency are thus obtained.

present invention'relates may, be definedas a two-cycle enginehav'ing' aclosed 'crank-case, and having a passage, leadingf from the crank-caseto the cylinder at a pointiivhere it will be closed by the piston at thebeginning of its'coilnpression stroke, and 'having an exhaust portleading from the cylinder at: a point Where 'it Will be closed by thepiston at the beginning ofits compression stroke, and having acheck-'valve to' admitair to the crank-case, and-havinga fuel-inlet intlthe 'closed end of the 'cylinder,, and havi g valve in saidfuelfinletclose 4to the cylinder, and' having a passage leading fro-mtlie crankandhaving a loaded check-valve in' said the'crank-case, and having anigniter to eX- scribed yas employed in the claims lis t0 be taken asabove defined.

I claim;-4 v 1.'.In aigas engine, the combination yof a crank case, acylinder, a crank shaft, a piston adapted to compress. airin the crank`air tojthe crank case, a piston controlled exhaust port in thecylinder, a plston conlleading from the crank case to said inlet port, afuel port in the cylinder head, a

valve seat-,secured .to the cylinder Within theincoming compressed airand before the fuel is admitted to the cylinder, thus avoidvmovingvthrough 'passa'ge29, ,understanding -impulse'will remain unchanged Vsolong as,

.last-mentioned passage'opening away fromv lode thecharge Within thecylinder. v The' Xpression gas engine o f the class dethe conveyance of'i pump. The liquid' fuel sprayed into lthe cylinder is delivered readyfor vspraying close thus-sprayed into the cylinder is notldep'end- 'ateaehimpulse ofthe engine. The stroke of shifted in order' to effectadjustment of the lThe cla-ss of gas-engines 'to ,Which-the.

case .to a point'behindsaid fuel-inlet valve,

case, a connecting ro'd, a valve for admitting l trolled inlet port inthe cylinder, a passage said port, a valve sleeve leading out from saidseat, a fuel valve for said seat arranged to open inwardly, a valve stemextending outward through said sleeve, a spring for closing the valve,and valve operating mechanism, the valve sleeve providing a fuel spaceabout said stem, a fuel pump, means for actuating said pump, a fuelconduit leading from said pump to the fuel chamber adjacent to saidvalve, an air conduit communicating with said fuel chamber and suppliedfrom the crank case, and a check valve in said conduit to prevent returnof air to the crank case. f

'2. In a gas engine, ,the'combinaticn of a crank case, a cylinder, 'acrank shaft, a piston adapted to compress air in the crank case, aconnecting rod, a valve for admitting air to the crank case, a pistoncontrolledieX- haust port in the cylinder, -a piston controlled inletport in the cylinder, a passage leading from the crank case to saidinlet port, a fuel port in the cylinder head, a fuel valve for said portarranged to open inwardly, valve-operating means, a fuel chamberadjacent to the valve, a fuel pump, means by which the action of theengine operates said pump, a fuel conduit from said pump to said fuelchamber, an air conduit communicating with said chamber, and connectedwith the crank pase, and a puppet valve in said conduit tov preventreturn of air from said fuel chamber.

3. In a gas engine, the combination of a crank case, a cylinder, a crankshaft, a pis- .ton adapted to compress air in the crank case, aconnecting rod, a valve for admitting air to the crank case, apistoncontrolled eX- haust port in the cylinder, a piston controlled inletport in the cylinder, a passage leading from the crank case to saidinlet port, a fuel port in the cylinder head, a fuel valve forsaid portarranged to open inwardly, valve-operating means, a fuel chamberadjacent to the valve, a fuel pump, means by which the action of theengine operates said pump, a fuel conduit from said pump to said fuelchamber, an air conduit lcommunicating with said chamber and connectedwith the crank'case, a puppet valve in said conduit to prevent return ofair from said fuel chamber, and means for adjusting the pumping capacityof the fuel pump.

4. In a gas engine, the combination of a crank case, a cylinder, a crankshaft, a piston adapted to compress air in thecrank case, a connectingrod, a valve for admitting air to the crank case', a piston controlledeX- haust port in the cylinder, a piston controlled inlet port in thecylinder, a passage leading from'the crank case to said inlet port, afuel port in thecylinder head, a fuel valve sleeve for said port, apuppet valve seated against the end of said sleeve and arranged to openinwardly, a valve stem, the sleeve being enlarged about said stem toprovide a fuel space, means for operating said valve, a fuel conduitleading to said fuel space, a fuel pump, motor-actuated means foractuating the pump, means by which the pump action may beadjusted, anair conduit leading from the crank case to the rear end of said fuelspace, and a check valve in said conduit to prevent return or air.

5. In a gas engine, the combination of crank case, a cylinder, a crankshaft, a piston adapted to compress air in the crank case, a connectingrod, a Valve for admitting air to the crank case, a piston controlledeX- haust port in the 'cylinder a piston controlled inlet port in thecylinder, a passage leading from thecrank case to said inlet port, afuel port in the cylinder head, a fuel valve sleeve for said port, apuppet valve seated against the end of said sleeve and arranged to openinwardly, a valve stem,l the sleeve being enlarged about said stem toprovide a fuel space, an electro-magnet fixed near said valve stem, anarmature on the stem to be pulled by the magnet to open' the valve,` aspring to close the valve, a current source, an electric circuitincluding said magnet and said current source, a fixed contact and amoving contact carried by the crank shaft, a fuel conduit leading tosaidl fuel space, a fuel pump, motor-actuated` mea-ns for actuating thepump, means by which the pump action may be adjusted, an air conduitleading from the crank case to the rear end of said fuel space, andacheck valve in said conduit to prevent return of air.

ALFRED RANDOLPH.

Witnesses: i

J. C. BOONE,

NINA STEELE.

